Seismic Behavior of a Coupled Wall System with HPFRC Materials in Critical Regions
Publication: Journal of Structural Engineering
Volume 137, Issue 12
Abstract
High-performance fiber-reinforced concrete (HPFRC) materials have a unique strain-hardening behavior in tension that translates into enhanced structural response, especially under reversed cyclic loading. Recent experimental research has shown that the use of HPFRC to replace regular concrete in components subjected to high cyclic deformation demands can lead to significant benefits, such as relaxation of detailing requirements and reduction in the amount of reinforcing steel. A structural system that is a good candidate to benefit from HPFRC is reinforced concrete coupled walls, where coupling beams and plastic hinge zones undergo large cyclic deformation demands during the design seismic event. This paper discusses the seismic performance of a prototype 18-story coupled-wall system in which the wall plastic hinge zones and the coupling beams are made of HPFRC materials instead of regular reinforced concrete. Computational simulation models are used to investigate system performance under various hazard levels, and system response is evaluated through various parameters including interstory drift, rotation, and distortion of critical structural parts. The simulation results show that the use of HPFRC in place of regular concrete leads to good overall seismic response with enhanced plastic hinging behavior in the wall piers and crack control in the coupling beams and piers.
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Acknowledgments
The research described herein was sponsored in part by the National Science Foundation under Grant No. NSFCMS 0530383, the University of Michigan, and a Studying Abroad grant from the Taiwanese Government. Special thanks are due to Prof. James K. Wight and Prof. Parra-Montesinos at the University of Michigan, Ann Arbor, for providing feedback about CW system design and response. The opinions, findings, and conclusions expressed in this paper are those of the authors and do not necessarily reflect the views of the sponsors or the individuals mentioned here.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 137 • Issue 12 • December 2011
Pages: 1499 - 1507
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Jun 15, 2010
Accepted: Feb 10, 2011
Published online: Nov 15, 2011
Published in print: Dec 1, 2011
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